Casing device for mobile handset

ABSTRACT

A casing device for mobile handsets is provided. The casing device is made of a fine ceramics material molded into a single piece. The casing device has fastening elements so as to be joined to the body of a mobile handset. A plastic film can be coated or adhered to the inner surface of the casing device for enhancing the casing device&#39;s structural strength and its robustness to external impact.

BACKGROUND OF THE INVENTION

(a) Technical Field of the Invention

The present invention generally relates to casing devices, and moreparticularly to a casing device made of a fine ceramics materialspecifically for mobile handsets.

(b) Description of the Prior Art

Mobile handsets or cellular phones have become indispensable accessoriesin people's daily life as the advancement of wireless communications hasoffered unparalleled convenience and mobility. The mobile handsetstherefore have evolved from simple communications devices to fashionableitems as demands continuously driving the industry for handsets withmore appealing styles and appearances.

Conventionally, most mobile handsets have plastic or metallic casesmolded into various shapes and colored by spray painting or japanning.The plastic cases, with inferior hardiness, suffer scratches and smudgesafter a period of usage. On the other hand, the japanning coating on themetallic cases would also peel off after a period of usage or underexternal impact.

SUMMARY OF THE INVENTION

The primary purpose of the present invention is to provide a casingdevice for mobile handsets. The casing device is made of a ceramicsmaterial molded into a single piece. The casing device has fasteningelements so as to be joined to the body of a mobile handset. A plasticfilm can be coated or adhered to the inner surface of the casing devicefor enhancing the casing device's structural strength and its robustnessto external impact.

The present invention has a number of advantages. First, the fineceramics material can have various colors and the color won't fade awayafter a period of usage. Secondly, the fine ceramics material offerssuperior hardness and smoothness to withstand scratches, abrasion, andsmears. The casing device therefore can still look like new even afterextended period of usage. The casing device can be all or part of theenclosure of a mobile handset. The casing device can also be made into areplaceable one so that a user can pick a suitable one for his or herhandset.

The foregoing object and summary provide only a brief introduction tothe present invention. To fully appreciate these and other objects ofthe present invention as well as the invention itself, all of which willbecome apparent to those skilled in the art, the following detaileddescription of the invention and the claims should be read inconjunction with the accompanying drawings. Throughout the specificationand drawings identical reference numerals refer to identical or similarparts.

Many other advantages and features of the present invention will becomemanifest to those versed in the art upon making reference to thedetailed description and the accompanying sheets of drawings in which apreferred structural embodiment incorporating the principles of thepresent invention is shown by way of illustrative example.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective diagram showing a casing device according to anembodiment of the present invention and a mobile handset to which thecasing device is affixed.

FIG. 2 is a perspective diagram showing the assembly of the casingdevice and the mobile handset of FIG 1.

FIG. 3 is a cross-sectional diagram of the casing device along the 3-3line of FIG. 2.

FIG. 4 is a perspective diagram showing the inner side of the casingdevice of FIG. 1.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following descriptions are of exemplary embodiments only, and arenot intended to limit the scope, applicability or configuration of theinvention in any way. Rather, the following description provides aconvenient illustration for implementing exemplary embodiments of theinvention. Various changes to the described embodiments may be made inthe function and arrangement of the elements described without departingfrom the scope of the invention as set forth in the appended claims.

As shown in FIGS. 1 to 4, a casing device for mobile handsets isprovided. The casing device 10 is made of a fine ceramics material suchas zirconia molded into a single piece. Please note that, in alternativeembodiments, other appropriate ceramics materials can also be used.

The casing device 10 has fastening elements 11 along its inner surface(i.e., the surface facing the mobile handset 20) so as to be joined tothe corresponding fastening elements on the body of a mobile handset 20.As such the casing device 10 can be reliably attached to the mobilehandset 20. The casing device 10 as described can function as the entireenclosure to the mobile handset 20 (i.e., enclosing the mobile handset20 entirely), or it can be a part of the enclosure to the mobile handset20 (i.e., enclosing a part of the body of the mobile handset 20 such asits front surface).

The locations and styles of the fastening elements 11 are not limited tothose shown in the diagrams. For example, the fastening elements 11 canbe hooks for locking into corresponding notches on the mobile handset20, or the fastening elements 11 can be notches for receiving hooks onthe mobile handset 20.

A plastic film 12 can be coated or adhered to the inner surface of thecasing device 10 for enhancing the casing device's structural strengthand its robustness or external impact.

The casing device 10 as described has a member of advantages over priorarts. First, fine ceramics material allows the casing device 10 to havevarious colors that won't fade away after a period of usage. Secondly,the fine ceramics material offers superior hardness and smoothness towithstand scratches, abrasions, and smears. The casing device 10therefore can still look like new even after extended period of usage.

It will be understood that each of the elements described above, or twoor more together may also find a useful application in other types ofmethods differing from type described above.

While certain novel features of this invention have been shown anddescribed and are pointed out in the annexed claim, it is not intendedto be limited to the details above, since it will be understood thatvarious omissions, modifications, substitutions and changes in the formsand details of the device illustrated and in its operation can be madeby those skilled in the art without departing in any way from the spiritof the present invention.

1. A casing device for a mobile handset, said casing device being madeof a fine ceramics material molded into a single piece, said casingdevice having a plurality of fastening elements for joining said casingdevice to said mobile handset.
 2. The casing device according to claim1, wherein a plastic film is provided on the inner surface of saidcasing device.
 3. The casing device according to claim 1, wherein saidcasing device completely encloses the body of said mobile handset. 4.The casing device according to claim 1, wherein said casing deviceencloses a part of the body of said mobile handset.
 5. The casing deviceaccording to claim 1, wherein said fastening elements are hooks.
 6. Thecasing device according to claim 1, wherein said fastening elements arenotches.